Computer Science
Scientific paper
Aug 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995itns...42..933o&link_type=abstract
IEEE Trans. Nucl. Sci., Vol. 42, No. 4, p. 933 - 939
Computer Science
1
Gamma-Ray Sources: Detectors
Scientific paper
A small desktop prototype of the Tracking and Imaging Gamma-Ray Experiment (TIGRE) has been assembled and tested at 511 keV and 900 keV. TIGRE was designed to observe cosmic gamma ray sources at energies of 0.3 to 100 MeV. Its major feature is its use of multi-layer silicon strip detectors to track Compton recoil electrons and positron-electron pairs. The small prototype consists of 7 double sided silicon strip detectors 3.2 cm×3.2 cm×300 micron with 1 mm pitch in both the x and y directions. The direction and energy of the Compton scattered gamma ray is measured with small CsI(Tl) photodiode detectors. Knowing the energy and momentum of the scattered electron and scattered photon allows to determine the incident direction uniquely. Non-tracked events, those interacting in only a single silicon plane, can only be determined to within the Compton scatter ring. An important requirement of TIGRE will be its ability to separate the upward moving gamma rays produced by cosmic ray interactions in the atmosphere from the downward moving gamma rays.
Bhattacharya Dipen
Blair Samantha
Case Gary
O'Neill Terrence J.
Tumer Tumay O.
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